tests/mysql_client_test.c:
  Fixed failing build on the windows platform.
mysql-test/r/ps_7ndb.result:
  The result of the adjusted test case after fix for bug#27590.
mysql-test/r/ps_6bdb.result:
  The result of the adjusted test case after fix for bug#27590.
sql/item_cmpfunc.cc:
  A warning is fixed.